Depending on the size of the airport, there may be one or several FBOs on site with varying facilities and costs. They can be very small operations with just a few services, like fuelling and a basic lounge, but can also be a large facility, with VIP lounges, aviation support, and a wide range of aircraft services.
Frequent-flying passengers are becoming aware of this choice and are expressing their own preference when booking a private jet through an operator.